<template>
  <div class="tab-control">
      <div class="tab-control-item" :class="{active: index === currentIndex}"
       @click="itemClick(index)"
      v-for="(item,index) in titles" :key="index">
          <span>{{item}}</span>
      </div>
  </div>
</template>

<script>
export default {

    props:{
        titles:{
            type:Array,
            default(){
            return []
        }
        }
},
data(){
    return {
        currentIndex:0
    }
},
methods: {
    itemClick(index){
        // 通过改变各自data函数中的currentIndex值来判断谁处于活跃状态
        this.currentIndex = index
        this.$emit('tabClick',index)
    }
}
}
</script>

<style>
.tab-control {
    display: flex;
    text-align: center;
    font-size: 15px;
    /* 给这个组件一个背景颜色，这样这个组件就不透明了 */
    background-color: #fff;
}

.tab-control-item {
    flex: 1;
    height: 40px;
    line-height: 40px;
}

.tab-control-item span{
    padding: 5px;
}

.active{
    color: var(--color-high-text);
}
.active span{
    border-bottom:3px solid var(--color-tint)
}
</style>